Front portion of a concrete block



FIG. 1 is a perspective view of a front portion of a concrete block according to my new design;

FIG. 2 is a front elevation view of the front portion depicted in FIG. 1;

FIG. 3 is a left side elevation view of the front portion depicted in FIG. 1;

FIG. 4 is a right side elevation view of the front portion depicted in FIG. 1;

FIG. 5 is a top plan view of the front portion depicted in FIG. 1; and,

FIG. 6 is a bottom plan view of the front portion depicted in FIG. 1.

The broken lines in the drawings illustrate an embodiment of the structural environment of a condrete block that includes the front portion of the design and is not part of the design sought to be patented. 

The ornamental design for a front portion of a concrete block, as shown and described. 